Steam-engine.



- W. P. RUBLE.

STEAM ENGINE. 7 APPLICATION FILED HAY 1-7, 1913.

1,077,097. Patented 0015.28, 1913.

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\ W. P. RUBLE! STEAM ENGINE.

APPLIOATION PILEDMAY 17, 1913.

Patented 0c t'.28,1913.

2 SHEETSSHEET 2.

STA ATE WILLIAM P. RUBLE, F ESHOND, NOBTH PAKOTA.

STEAM-ENGINE.

Specification of Letters Patent.

Application filed May 17 1913. Serial No. 768,218.

' struct and organize such mechanism as to avoid the friction which isincident to ordinary slide valves.

A further object of my invention is to operate the valves in such mannerthat they shall open and close their ports with ease and precision, andto generally improve the construction of the mechanism which controlsthe admission and exhaust.

' In carrying out my invention, I employ a steam cylinder and piston ofordinary construction, and I provide the cylinder with admission andexhaust ports which are controlled by novel valve mechanism. Theadmission ports at the opposite ends of the cylinder are controlled bycylindricalvalves which cooperate with a horizontally arranged blockwhich is'reciproeated in the main valve chest and is supported on thecylindrical valves. The block is formed with recesses at its oppositeends which receive ribs, cogs or'teeth on the cylindrical valves, andthrough the teeth extend channels which communicate with the interior ofthe valves which latter are each open at one end and connect; with othersteam chests. in turn connected through suitable ports with the steamcylinder. These latter ports are provided with novel mechanism which isoper; ated by the cylindrical valves when the latter are turned by thereciprocating block. Each of the cylindrical valves is mounted-in aroller bearing to avoid friction, and as the valve block-is reciprocatedthe ports in the teeth which lead to the interior of the valves arealternatelyopened and closed. The arrangement is such that the block asit recip-" rocates does not slide onthe cylindrical valvesbut merelyturns themto, a limited extent about their axes and the recessed ends ofthe block alternately rise and fall to uncover and close fthe ports inthe cylindrical valves in the manner hereinafter explained.

In the accompanying drawings :-Figu1'e 1 shows a vertical centralsection through a part of a steam engine with. my improved valvemechanism applied. Fig. 2 shows a side elevation of the same, with theside plate or cover plate removed. Fig. 3 is a detail view inperspective, showing how the roller bearings for the cylindrical valvesare constructed. -Fi 'g. 4 shows a vertical section on the line 4-4 ofFig. 1.' Fig. 5 is a perspective view of one of the cylindrical valvesand shows particularly-how. it is connected with one of the valvescontrolling the admission and exhaust at one end of the cyl inder. Fig.(5 is a detail View of one of the cylindrical valves and thereciprocating block, and illustrates the position of the parts mentionedwhen the port in the cylindrical valve is opened. Fig. 7is a similarview, showing the valve port closed.- Fig. '8

Patented Oct. 28, was.

is a detail view of the valve block and cylindrical valve, andindicatesdiagrammatically the posit on of the parts when both ports are.

closed, when one of the ports is closed and the other open, and whentheportsatoppd.

site ends of the block are one open and the other closed. Fig. 9 is adetail view. in perspective of one of the links employed for connectingthe valve block with the cylindrical valves.

The cylinder A and piston B are'of usual construction. The cylinder isprovided, on 'one side,.with a casing C for the valve mechanism andsteam chests. This casing may be providedwith a rempvablecover D,connected to a steam sup l'y pipe E and with a removable side plate F,as shown in Fig. 4. The casing C is provided with a main steam chest Gto' which steam is admitted from the supply pipe E, and in this chest isarrangeda reciprocating valve block H which is operated by the rod I,connected to any suitable operating part ofthe engine The block is givenonly'a short reciprocating motion and cooperates with the hollowcylindrical valves J and K, which are mounted in recesses 7', L- Ill thecasing and are supported by roller bearings L which latter may be of anysuitable kind but preferably consists of semi-circular frames l,carrying parallel spaced rollers l. i

Each oi the cylindrical valves 15 connected with the valve block G bymeansof links 9 of the kind shown in Fig. 9. One end of each link entersa recess g (Fig. 5) inthe valve while the other isconnected in a similarWay with the valve block. In this way the block and valves are heldtogether. Each of the cylindrical valves is formed with a rib, cog ortooth m, which is curved or convex astshown-and is adapted to fit acorresponding recess w'in theadjacent" end of the valvehlock. A steampassage 3 leads from the outside of each tooth or to the'interior oi thehollow cylindrical valve, and eachvalve isjformed with a hollowcylindrical extension of relatively small diameter (Fig. 4) whichextends through a stufiing-box' Nand opens'into a'steam chest 0 whichconnects with the steam cylinderA, in the manner shown in Figs. 2 and 4.

' s will be observed the chest 0 has a port 0 opening into a chamber 1in the casing and this chamber communicates through a port o with thecylinder A. These ports 0, o

are controlled by valves Q which. alsocontrol-the' ports leading to. theexhaust pipes B. -Each valve Q is L-shaped and when it is in position toclose the exhaust port the ad "mission port is open, and vice-versa.

The valve mechanism at opposite ends of the cylinder is ,of' the sameconstruction, and

each valve Q, is connected by a yielding link connection S with an'arm son the-adjacent cylindrical valve, and as the cylindrical valve isturned the valve Q connected therewith is suitably moved.

When the engine is on a center the admission ports of bothvalves J and Kare closed 'by the block H, whose. recessed ends at m cover the outerends of the channels 3 But when the block is moved to the left as viewedin F ig.--1, the valves J and K are bothturned toa limited extent by theblock.- the port of the valve K- remaining closed while the port of thevalve J is opened. as

indicated in Fig. 1, by reason of the factt-hat the left-hand. end ofthe block rises .from the tooth w'and uncovers the port.

This movement of the valve J also depresses the valve Qtl ig 2) andopens communication between the chamber 0. and the cylinder. A throughthe ports 0, 0, the exhaust port: being at this time closed. i

Figs. 1 and 2 show'the position of the partswhe n steam isbciug admittedto the left-hand end of the cylinder." It will be observed by referenceto Fig. Qthat the ex liaust port at the right handend of the cylinder isopen.

right is completed, the movement of the When the movement to the valveblock H is reversed, the admission port at the left-hand end 01 thecylinder being closed and tho-exhaust open, whilethc eihaust port atthe"opposite end of the cylinder is closed and steam is admitted.

It will be observed that there is verylittle' frictional contact betweenthe block and the cylindrical valves, the valve ports in the teeth ofthese valves being opened by the rig-ingof the block away from the teethrather thanby a sliding movement over the ports, and the-rollerbearings, afiordjan antifriction mounting for the valves. It will bealso observed that the part of the valve which controls the admission issomewhat larger than that part which controls the exhaust and when thecylinder is being exhausted the steam pressure assists in closing theadmission at 0 and in turning thcylin-v drical valve with which it isconnected.

I claim as my invent-ion:

l.- The combination with a steam cylinder and a steam chest ofcylindrical valves controlling ports connecting the steam cylinder withthe steam chest, roller bearings inwhich said valves'are mounted, andareciprocating ,block connected with the valves and controlling portstherein communicating with the steam chest.

'2. The combination with a steam cylinder -and a steam chest ofcylindrical valves at opposite ends of the cylinder controlling thevpassage of steam from the chest-to the cylinder, roller hearings inwhich said valves are mounted, and a reciprocating. block supported bythe valves connected therewith to turn the valves as it reciprocatesandwhich' opens and closes communication betweenthe nterior of saidvalves and the steam chest.

'3. The combination with a steam cylinder and a steam chest of hollowcylindrical valves interposed betweenthe cylinder and the chest and eachof which is provided with a tooth on its exterior having a passage communicating with the' interior of'the valve, and a reciprocating block inthe steam chest having recessed opposite ends connectingwith the teethof the valves and controlling the entrance of steam thercthrough.

4-. The combination with a steam cylinder and a steam chest of twohollow cylindrical valves interposed between the cylinder and the chestand each of which is provided with a tooth on its exterior having apassage comnulnicating withthe interior of the valve, and areciprocating block in the steam chest resting on the cylindrical valveand having recessed opposite ends connecting with the tect-h'of' thevalves adapted to close the entrance of steam thereto and to separatefrom the teeth and thus .open communication between .the interior of thevalves and the steam chest.

5. The combination with a steam cylinder and a main steam chest ofcylindrical valves at opposite ends of the cylinder controlling 6. Thecombination with a steam cylinder and a'maiu steam chest of hollowcylindrical steam chest, hollow'cylindrical valves com- I inunicatingtherewith, and controlling the passage of steam therefrom, linkconnections between said hollow cylindrical valves and the combinedadmission and exhaust valves, a reciprocating block in the main steamchest, and connections between said block and the cylindrical valveswhereby the latter are moved to control the admission of steam to. thecylinder and the exhaust therefrom. In testimony whereof, I havehereunte subscribed my name.

WILLIAM P. RUBLE.

Witnesses:

Tnos. B. Hosooon, RAY A. FUNnsoN.

